757 MAINTENANCE MANUAL
AILERON CONTROL DRUM ASSEMBLY - MAINTENANCE PRACTICES
_____________________________________________________
1. General_______
A. This procedure contains three tasks. The first task contains the data that is necessary to remove the aileron drum assembly or the bus force limiter. The second task contains the data that is necessary to install these components. The third task contains the data that is necessary to do a test of these components.
TASK 27-11-03-022-005
2. Remove Aileron Control Drum and Components__________________________________________
A. General
(1) This task contains two procedures, one to remove the aileron control drum, and one to remove the bus force limiter. Because this task contains two procedures, only the applicable group of steps must be done.
To start one of these procedures, do the " Prepare for Removal" group of steps. Then, do the group of steps that is necessary to remove the component.
B. Equipment
(1)
Main Gear Door Locks (Ref 32-00-15)
C.
References
(1)
AMM 06-41-00/201, Fuselage Access Doors and Panels
(2)
AMM 22-13-05/401, Aileron Control Force Transducer
(3)
AMM 24-22-00/201, Electrical Power - Control
(4)
AMM 25-50-01/401 Ceiling Panels
(5)
AMM 27-21-05/401, Rudder Jackshaft and Forward Quadrant
(6)
AMM 27-61-04/401, Spoiler RVDT Unit
(7)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic Systems
(8)
AMM 32-00-15/201, Landing Gear Door Locks
(9)
AMM 32-00-20/201, Landing Gear Downlocks
D.
Access
(1)
Location Zone
113 Area Forward of NLG Wheel Well
(2)
Access Panel 113AL Flight/Landing Gear/Engine Control Components
E.
Prepare for Removal
(1)
Supply electrical power (Ref 24-22-00).
S 212-052
(2)
Make sure the downlocks are installed on the nose and main landing gear (Ref 32-00-20).
S 862-051
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27-11-03
ALL ú ú 02 Page 201 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 492-001
WARNING: USE THE PROCEDURE IN AMM 32-00-15 TO INSTALL THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Open the doors for the landing gear and install the door locks (Ref 32-00-15).
S 862-006
(4)
Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00).
S 012-007
(5)
Open access door 113AL (Ref 06-41-00).
S 022-008
(6)
Remove the rudder pedal pushrods (Ref 27-21-05).
F.
Remove Aileron Control Drum (Fig. 201)
S 862-009
(1)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11E17, FLT CONT CMPTR PWR LEFT
(b)
11E18, FLT CONT CMPTR SERVO LEFT
(c)
11E20, FLT CONT CMPTR PWR CENTER
(d)
11E21, FLT CONT CMPTR SERVO CENTER
(e)
11E35, FLT CONT CMPTR PWR RIGHT
(f)
11E36, FLT CONT CMPTR SERVO RIGHT
S 022-010
(2)
Remove the spoiler RVDT unit (Ref 27-61-04).
S 032-002
(3)
Disconnect these items:
(a)
Disconnect cables A1A and A1B or A2A and A2B from the quadrant and tag them for identification.
NOTE: The turnbuckles for cables A1A and A1B are located
____ behind the ceiling panel inboard of the panel adjacent to the forward cargo door. The turnbuckles for cables A2A and A2B are located behind the ceiling panel just inboard of and adjacent to the forward cargo door (AMM 25-50-01/401).
(b) Disconnect the bus force limiter from the captain's drum assembly. 1) Remove the bolt, bushing, washer, and the nut.
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